| |
| | Science Program > Issues in Ecology > (Site not responding. Last check: 2007-10-22) |
 | | An estimated 162 exotic species now reside in the Great Lakes, including introduced sport fish. |
 | | Although the zebra mussel and sea lamprey have received the most attention, many other less apparent species profoundly affect the ecosystem, including quagga mussels, predatory zooplankton such as Cercopagis pengoi and Bythotrephes cederstroemi, the benthic amphipod Echinogammarus ischnus, and the round and tubenose gobies. |
 | | In addition to their ecological impacts, lamprey cost $10 million in control efforts each year, and zebra mussel control has totaled some $4 billion as of 2001. |
| www.esa.org /science/Issues/TextIssues/issue10.php (9106 words) |
|